Bad customer service from Invent-A-Part

Hi there folks! Loved my rigidbot back in the day when it worked. I've been trying to contact Invent-A-Part for a looooong time now to replace my parts. This will probably be a long post, but please hear me out!

I got my RigidBot BIG (with dual extruder) at the end of 2014. Only a couple of months later my bot locked up, which resulted in one of the extruders to melt down. I then got in touch with Invent-A-Part to replace my parts, so I returned them. To this day I still haven't received my replacement parts and they don't reply to my support ticket at all. Not even on email. I'm furious because I really want my bot to be working again. Now, I understand my warranty isn't valid anymore but it was back when I shipped them my defective parts. So basically, everything should be in order.

The thing is, I need help from you guys to give me tips on what to do now since Invent-A-Part completely ignores me. Or at least, so it seems..

Thanks in advance for any reply btw! Happy printing to all of you who are able to still do it..